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> Becton dickinson qbc star centrifugal hematology system
Becton dickinson qbc star centrifugal hematology system
The QBC Star Centrifugal Hematology System provides a diagnostic hematology profile on venous or capillary blood providing values for:
Mean Corpuscular Hemoglobin Concentration (MCHC)
Granulocyte count (% and number)
Lymphocyte/monocyte count (% and number)
It has been known for many years that the grayish-white layer (buffy coat) that appears above the red blood cells in a hematocrit tube contained packed layers of leukocytes (white blood cells) and thrombocytes (platelets)1-5. The QBC Star Centrifugal Hematology System uses technologies that make it possible to quantify the buffy coat cells.
When the QBC Star tube is filled with blood and placed into the QBC Star instrument, the tube is spun at a high rate of speed causing the different types of cells in the blood to separate into layers or bands from the heaviest to the lightest. The QBC Star System uses a special tube designed to enhance the natural separation properties of a whole blood sample when it is centrifuged. A special coating in the QBC Star tube stains the two white blood cell populations (granulocytes appear orange-yellow and lymphocytes/monocytes appear green) and the platelet layer (platelets appear yellow-orange). The ability to quantify the cells is also enhanced by the insertion of a precision plastic float into the QBC Star tube that mechanically expands the buffy coat layers. The hematocrit, white blood cell counts, and platelet count are directly measured from the cell layers. The float, whose density approximates the buffy coat cells, will also penetrate the red blood cell layer. The QBC Star hemoglobin measurement is directly related to the density of the red blood cells, and is based on the depth of penetration of the float into the red blood cell layer. Mean corpuscular hemoglobin concentration (MCHC) is electronically calculated using the standard formula [(HGB / HCT) * 100]6, 7.
The QBC Star tube is also internally coated with anticoagulants that allow collection of capillary blood directly from a skin puncture site.
The QBC Star System is intended for in vitro diagnostic use.
